Obesity remains a serious health problem and it is no secret that many people want to lose weight. Behavioral economists typically argue that “nudges” help individuals with various decisionmaking flaws to live longer, healthier, and better lives. In an article in the new issue of Regulation, Michael L. Marlow discusses how nudging by government differs from nudging by markets, and explains why market nudging is the more promising avenue for helping citizens to lose weight.

Armed with a computer model in 1935, one could probably have written the exact same story on California drought as appears today in the Washington Post some 80 years ago, prompted by the very similar outlier temperatures of 1934 and 2014.

Two long wars, chronic deficits, the financial crisis, the costly drug war, the growth of executive power under Presidents Bush and Obama, and the revelations about NSA abuses, have given rise to a growing libertarian movement in our country – with a greater focus on individual liberty and less government power. David Boaz’s newly released The Libertarian Mind is a comprehensive guide to the history, philosophy, and growth of the libertarian movement, with incisive analyses of today’s most pressing issues and policies.

Keynesian economics is a failure. It didn’t work for Hoover and Roosevelt in the 1930s. It didn’t work for Japan in the 1990s. And it didn’t work for Bush or Obama in recent years. No matter where’s it’s been tried, it’s been a flop. So why, whenever there’s a downturn, do politicians resuscitate the idea that bigger government will “stimulate” the economy?

And I specifically challenged Keynesians in 2013 to explain why automatic budget cuts were supposedly a bad idea given that the American economy expanded when the burden of government spending shrank during the Reagan and Clinton years.

Keynesian economics is the perpetual motion machine of the left. You build a model that assumes government spending is good for the economy and you assume that there are zero costs when the government diverts money from the private sector.

With that type of model, you then automatically generate predictions that bigger government will “stimulate’ growth and create jobs. Heck, sometimes you even admit that you don’t look at real world numbers.

With the death of Margaret Thatcher, and the ensuing profusion of commentary on her legacy, it is worth looking back at an overlooked chapter in the Thatcher story. I am referring to her 1981 showdown with the Keynesian establishment—a showdown that the Iron Lady won handily. Before getting caught up with the phony “austerity vs. fiscal stimulus” debate, the chattering classes should take note of how Mrs. Thatcher debunked the Keynesian “fiscal factoid.”

According to the Oxford English Dictionary, a factoid is “an item of unreliable information that is reported and repeated so often that it becomes accepted as fact.” The standard Keynesian fiscal policy prescription for the maintenance of non-inflationary full employment is a fiscal factoid. The chattering classes can repeat this factoid on cue: to stimulate the economy, expand the government’s deficit (or shrink its surplus); and to rein in an overheated economy, shrink the government’s deficit (or expand its surplus).

Unfortunately, the grim reaper finally caught up with Margaret Thatcher—but not before she laid waste to 364 wrong-headed British Keynesians.

In 1981, Prime Minister Thatcher made a dash for confidence and growth via a fiscal squeeze. To restart the economy, Mrs. Thatcher instituted a fierce attack on the British fiscal deficit, coupled with an expansionary monetary policy. Her moves were immediately condemned by 364 distinguished economists. In a letter to The Times, they wrote a knee-jerk Keynesian response: “Present policies will deepen the depression, erode the industrial base of our economy and threaten its social and political stability.”

Mrs. Thatcher was quickly vindicated. No sooner had the 364 affixed their signatures to that letter than the economy boomed. Confidence in the British economy was restored, and Mrs. Thatcher was able to introduce a long series of deep, free-market reforms.

As for the 364 economists (who included seventy-six present or past professors, a majority of the Chief Economic Advisors to the Government in the post-WWII period, and the president, as well as nine present or past vice-presidents, and the secretary general of the Royal Economic Society), they were not only wrong, but also came to look ridiculous.

In the United States, the peddlers of the fiscal factoid have never suffered the intellectual humiliation of their British counterparts. In consequence, American Keynesians can continue to peddle snake oil with reckless abandon and continue to influence policy in Washington, D.C., and elsewhere.

Herman Cain probably had the best reaction to the President’s speech: “We waited 30 months for this?”

My reaction yesterday was mixed. In some sense, I was almost embarrassed for the President. He demanded a speech to a joint session of Congress and then produced a list of recycled (regurgitated might be a better word) Keynesian gimmicks.

But I was also angry. Tens of millions of Americans are suffering, but Obama is unwilling to admit big government isn’t working. I don’t know whether it’s because of ideological blindness or short-term politics, but it’s a tragedy that ordinary people are hurting because of his mistakes.

This is not to say that Mr. Obama hasn’t made any intellectual progress across his 32 months in office. He now admits the damage that overregulation can do, though he can’t do much to stop it without repealing his own legislative achievements. He now acts as if he believes that taxes matter to investment and hiring, at least for the next year. And he now sees the wisdom of fiscal discipline, albeit starting only in 2013. Yet the underlying theory and practice of the familiar ideas that the President proposed last night are those of the government conjurer. More targeted, temporary tax cuts; more spending now with promises of restraint later; the fifth (or is it sixth?) plan to reduce housing foreclosures; and more public works spending, though this time we’re told the projects really will be shovel-ready.

And let’s also note that Obama had the gall to demand that Congress immediately enact his plan - even though he hasn’t actually produced anything on paper!

If you didn’t see it when I posted it a month or so ago, here’s the video I did last year when Obama was proposing a second faux stimulus. Now that he’s on his fourth of fifth jobs-bill/stimulus/growth-package/whatever, it’s worth another look.

Though I must confess that I made a mistake when I put together this video. I mistakenly assumed the economy would have at least managed to get back to a semi-decent level of growth. More confirmation that economists are lousy forecasters.

What irked me was the implicit Keynesian thinking in the interview. Both of them kept talking about how the economy would have been weaker in the absence of government spending, and they fretted that “austerity” in Washington could further slow the economy in the future.

This was especially frustrating for me since I’ve spent years trying to get people to understand that money doesn’t disappear if it’s not spent by government. I repeatedly explain that less government means more money left in the private sector, where it is more likely to create jobs and generate wealth.

In recent years, though, I’ve begun to realize that many people are accidentally sympathetic to the Keynesian government-spending-is-stimulus approach. They mistakenly think the theory makes sense because they look at GDP, which measures how national income is spent. They’d be much less prone to shoddy analysis if they instead focused on how national income is earned.

This should be at least somewhat intuitive, because we all understand that economic growth occurs when there is an increase in things that make up national income, such as wages, small business income, and corporate profits.

But as I listened to the interview, I began to wonder whether more people would understand if I used the example of a household.

Let’s illustrate by imagining a middle-class household with $50,000 of expenses and $50,000 of income. I’m just making up numbers, so I’m not pretending this is an “average” household, but that doesn’t matter for this analysis anyway.

Expenses Income

Mortgage $15,000 Wages $40,000

Utilities $10,000 Bank Interest $1,000

Food $5,000 Rental Income $8,000

Taxes $10,000 Dividends $1,000

Clothing $2,000

Health Care $3,000

Other $5,000

The analogy isn’t perfect, of course, but think of this household as being the economy. In this simplified example, the household’s expenses are akin to the way the government measures GDP. It shows how income is allocated. But instead of measuring how much national income goes to categories such as consumption, investment, and government spending, we’re showing how much household income goes to things like housing, food, and utilities.

The income side of the household, as you might expect, is like the government’s national income calculations. But instead of looking at broad measures of things such wages, small business income, and corporate profits, we’re narrowing our focus to one household’s income.

Now let’s modify this example to understand why Keynesian economics doesn’t make sense. Assume that expenses suddenly jumped for our household by $5,000.

Maybe the family has moved to a bigger house. Maybe they’ve decided to eat steak every night. But since I’m a cranky libertarian, let’s assume Obama has imposed a European-style 20 percent VAT and the tax burden has increased.

Faced with this higher expense, the household – especially in the long run – will have to reduce other spending. Let’s assume that the income side has stayed the same but that household expenses now look like this.

Expenses

Mortgage $15,000

Utilities $9,000 (down by $1,000)

Food $4,000 (down by $1,000)

Taxes $15,000 (up by $5,000)

Clothing $2,000

Health Care $3,000

Other $2,000 (down by $3,000)

Now let’s return to where we started and imagine how a financial journalist, applying the same approach used for GDP analysis, would cover a news report about this household’s budget.

This journalist would tell us that the household’s total spending stayed steady thanks to a big increase in tax payments, which compensated for falling demand for utilities, food, and other spending.

From a household perspective, we instinctively recoil from this kind of sloppy analysis. Indeed, we probably are thinking, “Spending for other categories – things that actually make my life better – are down because the tax burden increased!!!”

But this is exactly how we should be reacting when financial journalists (and other dummies) tell us that government outlays are helping to prop up total spending in the economy.

Let’s conclude by briefly explaining how journalists and others should be looking at economic numbers. And the household analogy, once again, will be quite helpful.

It’s presumably obvious that higher income is the best thing for our hypothetical family. A new job, a raise, better investments, an increase in rental income. Any or all of these developments would be welcome because they mean higher living standards and a better life. In other words, more household spending is a natural consequence of more income.

Similarly, the best thing for the economy is more national income. More wages, higher profits, increased small business income. Any or all of these developments would be welcome because we would have more money to spend as we see fit to enjoy a better life. This higher spending would then show up in the data as higher GDP, but the key thing to understand is that the increase in GDP is a natural resultof more national income.

Simply stated, national income is the horse and GDP is the cart. This video elaborates on this topic, and watching it may be more enjoyable than reading my analysis.

Based on this morning’s numbers, I’ve updated my chart showing what the Obama Administration said would happen with the so-called stimulus compared to what actually has happened. As you can see, the unemployment rate is about 2.5 percentage points higher than the White House claimed it would be at this point.

Since I just did an I-told-you-so post about Greece, I may as well pat myself on the back again (albeit for another completely obvious prediction). Here’s the video I narrated a couple of years ago on the Obama faux stimulus.